Ah Njoe Tjoeb Not Playing CDR's

I have a computerless friend, who just purchased a new Ah Njoe Tjoeb CD Player. He says his only disappointment is that it doesn't play CR-R's. "Any CD-R's," I asked. None, he said. I asked if it mentioned anything about that in the manual and he said he thought it did. I own many, many CD-R's. Many that are recordings of my analog software that I've converted over. I couldn't get by with a player that didn't play them. Does anyone know if there's a fix for this that I could pass along to him?
Thanks,
David